公开(公告)号：US06493539B1

公开(公告)日：2002-12-10

申请号：US09362548

申请日：1999-07-28

申请人： Steven A. Falco ,  Alex Matusevich ,  Bernard McKay ,  Myles P. Murphy ,  Sheng-Jen Tsai

发明人： Steven A. Falco ,  Alex Matusevich ,  Bernard McKay ,  Myles P. Murphy ,  Sheng-Jen Tsai

IPC分类号： H04Q720

CPC分类号： H04W56/00 ,  G01S5/021 ,  G01S5/0226 ,  H04B7/2687 ,  H04L7/033 ,  H04W64/00

摘要： The synchronization system uses a TDMA or AMPS air interface to provide timing synchronization between previously unsynchronized base stations. The synchronization of base stations is critical between when determining the geographical position of a mobile because the geographical position is determined using a time difference of arrival method. In order to synchronize a remote base station with a serving base station, the remote base station receives a signal from the serving base station and measuring the receiving time of the signal at the remote base station in relation to the clock of the remote base station. The synchronization system determines the transmission time of the signal based on the reception time of the signal and the distance between the base stations, in relation to the clock signal of the second station, and synchronizes the clock of the remote base station to the clock of the serving base station based on the offset in the clock cycles at the time the signal was transmitted.

摘要翻译： 同步系统使用TDMA或AMPS空中接口来提供先前不同步的基站之间的定时同步。 在确定移动站的地理位置时，基站的同步至关重要，因为使用到达时间方法确定地理位置。 为了使远程基站与服务基站同步，远程基站从服务基站接收信号，并相对于远程基站的时钟测量远程基站处的信号的接收时间。 同步系统基于信号的接收时间和基站之间的距离相对于第二站的时钟信号确定信号的传输时间，并将远程基站的时钟同步到 基于在发送信号时的时钟周期的偏移的服务基站。